A high-reliability dead center automatic locking device

Abstract

The present invention provides a high-reliability dead center automatic locking device, which includes a mounting base; a locking device is connected to the bottom of the mounting base, and a limiting shaft is connected to the side wall; a locking oil cylinder connected to the mounting base is provided on one side of the limiting shaft, and the locking device is connected to a crankshaft through a swing link; a pressure transmitter is provided on the oil pipeline of the locking oil cylinder, and the piston rod of the locking oil cylinder is connected to a sliding rod through a hinge shaft; one end of the sliding rod is connected to the crankshaft through a reversing shaft, and a guide body is slidably connected to the sliding rod, and the guide body is connected to the side wall of the mounting base. The present invention realizes the locking of the locking interfaces of different carriers by replacing the locking device, and has a simple and reliable structure, convenient operation, and strong versatility; the overall structure is simple, light in weight, convenient to use and operate, realizes the steering of motion, reduces the installation space, and has a wider applicability; it has strong portability and is easy to realize automatic control by combining with a control system.

Description

Technical Field

[0001] The invention relates to a high-reliability dead point automatic locking device, belonging to the technical field of transport locking mechanisms in transport devices, and in particular to a special equipment transport locking mechanism for transporting fixed loads. Background Art

[0002] With the diversification of vehicle cargo, different cargoes have different locking interfaces, and multiple locking devices are needed to lock the cargoes. Generally, manual locking with a live bolt is used for locking. In the actual locking process, the live bolt is mainly locked by manually turning over the bolt rod and tightening the nut. The manual turning over of the live bolt is laborious and wastes time. It is easy to accidentally touch the outer surface of the cargo, which has quality risks. In addition, it is impossible to effectively lock some densely distributed and unreachable places. There are also automatic devices that use multiple mechanism linkage to lock, but most of them have the driving and locking directions on the same plane. This method has a large space restriction and can only lock a single form of locking interface, and cannot achieve the locking of multiple interfaces. On the other hand, with the continuous application of locking technology, flexibility requirements have also been put forward for the locking method. Therefore, it is urgent to provide a locking device with simple structure, convenient operation and strong versatility to meet the locking requirements. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a high-reliability dead point automatic locking device, which solves the problem that the existing locking device has insufficient installation space and can only lock a single interface.

[0004] The present invention is achieved through the following technical solutions.

[0005] The present invention provides a high-reliability dead point automatic locking device, comprising a mounting seat; a locker is connected to the bottom of the mounting seat, and a limit shaft is connected to the side wall; a locking cylinder connected to the mounting seat is provided on one side of the limit shaft, and the locker is connected to the crankshaft through a sway connecting rod; a pressure transmitter is provided on the cylinder pipeline of the locking cylinder, and the piston rod of the locking cylinder is connected to a sliding rod through a hinge shaft; one end of the sliding rod is connected to the crankshaft through a reversing shaft, and a guide body is slidably connected to the sliding rod, and the guide body is connected to the side wall of the mounting seat.

[0006] The locking device and the limiting shaft are connected to the mounting seat through a pin shaft respectively, and bearings are respectively arranged at both ends of the pin shaft.

[0007] The guide body comprises a guide frame, a slide groove is provided in the guide frame, and a rolling bearing is provided in the slide groove; the guide frame is connected with the mounting seat through the slide groove.

[0008] The locking oil cylinder is connected to the mounting seat through an end face flange.

[0009] The end face flange is fixedly connected to the mounting seat by screws.

[0010] The locking device, the swing link, and the crankshaft form a crank-rocker mechanism, and the locking oil cylinder is a double-acting hydraulic cylinder.

[0011] The rotating shaft of the locking device is connected to the crankshaft through the swing link.

[0012] The crankshaft is a three-point hinge structure, with the middle point being the fixed point and the two ends being the movable points; a pin shaft is provided in the fixed point.

[0013] The locking device, the swing link, the crankshaft, the reversing shaft, the sliding rod, and the hinge shaft are hinged by pin shafts to form a link structure.

[0014] The piston rod end of the locking oil cylinder is hinged to the hinge shaft by a spherical plain bearing.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. During the locking process, the crankshaft rotates counterclockwise. When it touches the limit shaft, the pressure increases, and the pressure transmitter feeds back a signal to control the locking oil cylinder to stop contracting. The locking device then enters the dead point locking state, which can prevent inaccurate reaching or over-dead point operation during the working process and ensure the reliability of locking.

[0017] 2. By replacing the locking device, the locking of different locking interfaces of the transported objects is realized. Its structure is simple and reliable, the operation is convenient, and the versatility is strong.

[0018] 3. The overall structure is simple, the weight is light, the use and operation are convenient, multiple turns of motion are realized, the installation space is reduced, and the applicability is wider.

[0019] 4. It has strong portability and is easy to realize automatic control by combining with the control system.

[0020] 5. During the guiding process, a rolling bearing is added to change sliding to rolling, reduce the friction force, and avoid jamming during the sliding process.

[0021] 6. The horizontal linear motion is converted into a vertical linear motion and then into a rotational motion in the vertical plane, greatly reducing the installation space and having a wider applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic structural diagram of the initial position during the locking process of the present invention;

[0023] Figure 2 Schematic structural diagram of the locking position during the locking process of the present invention;

[0024] Figure 3Yes Figure 1 Schematic diagram of the structure of the locking device in

[0025] Figure 4 Yes Figure 1 Schematic diagram of the structure of the crankshaft in

[0026] Figure 5 Yes Figure 1 Schematic diagram of the structure of the guide body in

[0027] Figure 6 Schematic diagram of the structure of the load locking interface;

[0028] Figure 7 Schematic diagram of the structure of the present invention;

[0029] Figure 8 Schematic diagram of the structure of the present invention from another perspective;

[0030] In the figure: 1 - mounting base, 2 - locking device, 3 - yaw link, 4 - crankshaft, 5 - limit shaft, 6 - reversing shaft, 7 - sliding rod, 8 - guide body, 9 - hinge shaft, 10 - locking oil cylinder, 11 - pressure transmitter, 12 - rolling bearing, 13 - guide frame. Specific implementation mode

[0031] The technical solution of the present invention will be further described below, but the scope of protection claimed is not limited thereto.

[0032] Embodiment 1

[0033] As Figures 3 to 8 shown, a high - reliability dead - point automatic locking device includes a mounting base 1; the bottom of the mounting base 1 is connected with a locking device 2, and the side wall is connected with a limit shaft 5; on one side of the limit shaft 5, there is a locking oil cylinder 10 connected with the mounting base 1, and the locking device 2 is connected with a crankshaft 4 through a yaw link 3; on the oil pipeline of the locking oil cylinder 10, there is a pressure transmitter 11, and the piston rod of the locking oil cylinder 10 is connected with a sliding rod 7 through a hinge shaft 9; one end of the sliding rod 7 is connected with the crankshaft 4 through a reversing shaft 6, and a guide body 8 is slidably connected on the sliding rod 7, and the guide body 8 is connected with the side wall of the mounting base 1.

[0034] The locking device 2 and the limit shaft 5 are respectively connected with the mounting base 1 through pin shafts, and bearings are respectively arranged at both ends of the pin shafts.

[0035] The guide body 8 includes a guide frame 13, a chute is opened in the guide frame 13, and a rolling bearing 12 is arranged in the chute; the guide frame 13 is connected with the mounting base 1 through the chute.

[0036] The locking oil cylinder 10 is connected with the mounting base 1 through an end face flange.

[0037] The end face flange is fixedly connected to the mounting seat 1 by screws.

[0038] The locking device 2, the swing link 3, and the crankshaft 4 form a crank-rocker mechanism. The locking oil cylinder 10 is a double-acting hydraulic cylinder with a stroke of 50 mm.

[0039] The rotating shaft of the locking device 2 is connected to the crankshaft 4 through the swing link 3.

[0040] The crankshaft 4 is a three-point hinged structure, with the middle point being a fixed point and the two ends being movable points; a pin shaft is provided in the fixed point.

[0041] The locking device 2, the swing link 3, the crankshaft 4, the reversing shaft 6, the sliding rod 7, and the hinge shaft 9 are hinged by pin shafts to form a linkage structure.

[0042] The piston rod end of the locking oil cylinder 10 is hinged to the hinge shaft 9 by a spherical plain bearing.

[0043] Embodiment 2

[0044] Based on the technical solution of Embodiment 1, and:

[0045] The mounting seat 1 is the installation foundation of the locking device and is a welded frame structure. The mounting holes on the bottom surface of the mounting seat 1 can be adaptively designed according to the actual installation space.

[0046] After welding, each mounting surface is machined to ensure the installation position accuracy, and at the same time, ensure that the mounting reference of each part is unified and the locking oil cylinder 10 can move flexibly after assembly.

[0047] Embodiment 3

[0048] Based on the technical solution of Embodiment 1, and:

[0049] The locking device is driven by the locking oil cylinder 10, driving the hinge shaft 9, the guide body 8, the sliding rod 7, and the crankshaft 4 to rotate, and pushing the locking device 2 to rotate to complete the locking and unlocking of the load.

[0050] The locking device 2 and the limit shaft 5 are installed on the mounting seat 1 by pin shafts. Bearings are installed on both sides of the pin shafts to reduce the friction during rotation, and a snap ring is used for anti-loosening at the end face, saving installation space.

[0051] Embodiment 4

[0052] Based on the technical solution of Embodiment 1, and:

[0053] The locking device 2 adopts a crank-rocker structure, and the relative position between its fixed shaft and rotating shaft can be adjusted according to actual requirements. The pressing surface of the locking device 2 adopts an inclined surface pressing method, and can be specially designed on the pressing surface according to the shape and size of the load. The load is limited left and right by the convex platform of the locking device 2. At the same time, for different loads, only the locking device needs to be replaced to achieve universality.

[0054] Embodiment 5

[0055] Based on the technical solution of Embodiment 1, and:

[0056] One end of the yaw connecting rod 3 is installed on the rotating shaft of the locking device 2, which is used to adjust its locking stroke according to the locking requirements of the load to achieve universality for different loads. At the same time, the other end of the yaw connecting rod 3 is connected to the crankshaft 4. In the locked state, the turning points at both ends of the yaw connecting rod 3 and the turning point of the crankshaft 4 are collinear to form a dead point, realizing high-reliability locking of the load and avoiding the locking oil cylinder 10 from being stressed in the locked state.

[0057] Embodiment 6

[0058] Based on the technical solution of Embodiment 1, and:

[0059] The crankshaft 4 is a three-point hinged structure arranged in a triangle. Among them, the middle point is the fixed point and the two ends are the movable points.

[0060] During the locking process, the left movable point is pushed downward by the yaw connecting rod 3, causing the right movable point to rotate around the fixed point. When the right movable point, the fixed point and the rotating shaft of the locking device 2 are collinear, a dead point is formed to realize the locking of the load. At the same time, the fixed point pin shaft on the crankshaft 4 is the main stress component of the locking device, and 40Cr material can be used for quenching and tempering treatment to ensure that its strength meets the requirements.

[0061] Embodiment 7

[0062] Based on the technical solution of Embodiment 1, and:

[0063] The connecting rod mechanism is used to adjust the installation direction of the locking oil cylinder 10. At the same time, the sliding rod 7 is guided and limited by the guide body 8 to make the connecting rod mechanism move in a predetermined direction.

[0064] Embodiment 8

[0065] Based on the technical solution of Embodiment 1, and:

[0066] The working pressure of the locking oil cylinder 10 is detected in real time by the pressure transmitter 11, and the pressure threshold is set to realize the automatic judgment of the locking and unlocking states of the locking oil cylinder 10, and the judgment signal is transmitted to the upper computer to realize automatic control.

[0067] Embodiment 9

[0068] Based on the technical solution of Embodiment 1, and:

[0069] As Figure 3 shown, the relative positions of the two connection holes of the locking device 2 are fixed, and the locking of different carriers is achieved by replacing different locking devices 2.

[0070] Embodiment 10

[0071] Based on the technical solution of Embodiment 1, and:

[0072] As Figure 1 and 2 as shown in 6, the locking device 2 is located inside the mounting seat 1. In the initial state, the locking oil cylinder 10 is in the fully extended state. When locking is required, the locking oil cylinder 10 retracts, driving the sliding rod 7 to move downward through the hinge shaft 9. The downward movement of the sliding rod 7 drives the crankshaft 4 to rotate counterclockwise through the commutator 6. The crankshaft 4, the swing link 3, the locking device 2, and the mounting seat 1 form a crank-rocker mechanism. During the counterclockwise rotation of the crankshaft 4, the locking device 2 is pushed out in the clockwise direction; when the crankshaft 4 touches the limiter 5, the pressure transmitter 11 feeds back a signal to control the locking oil cylinder 10 to stop contracting. The wedge block on the locking device 2 is inserted into the groove of the carrier locking interface, and the end face of the locking device 2 contacts the end face of the locking interface. At this time, the crankshaft 4 and the swing link 3 are in a collinear state, forming a dead point, and the locking oil cylinder 10 does not need to provide a large force to achieve locking, saving the use cost.

[0073] Embodiment 11

[0074] Based on the technical solution of Embodiment 1, and:

[0075] In the locked state, the locking oil cylinder 10 does not need to bear the locking force and the impact generated by the load during transportation and work.

[0076] Embodiment 12

[0077] Based on the technical solution of Embodiment 1, and:

[0078] There are 2 hinge points on the locking device 2. The upper end of the locking device 2 is fixedly hinged to the mounting seat 1 through a hinge point using a pin shaft, and the lower end of the locking device 2 is movably hinged to the swing link 3 using a pin shaft.

[0079] Embodiment 13

[0080] Based on the technical solution of Embodiment 1, and:

[0081] By the telescopic movement of the locking oil cylinder 10, the angle between the pressing surface of the locking device 2 and the mounting surface of the mounting seat 1 can be rotated within the range of 20° to 57°.

[0082] Embodiment 14

[0083] Based on the technical solution of Embodiment 1, and:

[0084] The commutation shaft 6 is a speed commutation member, which converts the vertical translation motion of the sliding rod 7 into the rotational motion of the crankshaft 4.

[0085] The sliding rod 7, the hinge shaft 9 and the push rod of the locking oil cylinder 10 are hinged by a pin shaft to form a double-slider mechanism, which converts the horizontal motion of the push rod of the locking oil cylinder 10 into the vertical motion of the sliding rod through the hinge shaft.

[0086] The guide body 8 adopts a rolling bearing 12 to realize that the guiding between the guide body and the sliding rod 7 is changed from sliding friction to rolling friction, so as to avoid jamming during the movement process.

Claims

1. A high-reliability dead-center automatic locking device, comprising a mounting base (1). Characterized in that: A locking device (2) is connected to the bottom of the mounting base (1), and a limiting shaft (5) is connected to the side wall; a locking oil cylinder (10) connected to the mounting base (1) is provided on one side of the limiting shaft (5), and the locking device (2) is connected to a crankshaft (4) through a swing link (3); a pressure transmitter (11) is provided on the oil pipeline of the locking oil cylinder (10), and the piston rod of the locking oil cylinder (10) is connected to a sliding rod (7) through a hinge shaft (9); one end of the sliding rod (7) is connected to the crankshaft (4) through a reversing shaft (6), a guide body (8) is slidably connected to the sliding rod (7), and the guide body (8) is connected to the side wall of the mounting base (1). The guide body (8) includes a guide frame (13), a chute is provided in the guide frame (13), and a rolling bearing (12) is provided in the chute; the guide frame (13) is connected to the mounting base (1) through the chute, the locking oil cylinder (10) is connected to the mounting base (1) through an end face flange, the end face flange is fixedly connected to the mounting base (1) by screws, and the piston rod end of the locking oil cylinder (10) is hinged to the hinge shaft (9) by a spherical plain bearing.

2. The high-reliability dead-center automatic locking device according to claim 1, Characterized in that: The locking device (2) and the limiting shaft (5) are respectively connected to the mounting base (1) through pin shafts, and bearings are provided at both ends of the pin shafts.

3. The high-reliability dead-center automatic locking device according to claim 1, Characterized in that: The locking device (2), the swing link (3), and the crankshaft (4) form a crank-rocker mechanism, and the locking oil cylinder (10) is a double-acting hydraulic cylinder.

4. The high-reliability dead-center automatic locking device according to claim 1, Characterized in that: The rotating shaft of the locking device (2) is connected to the crankshaft (4) through a swing link (3).

5. The high-reliability dead-center automatic locking device according to claim 1, Characterized in that: The crankshaft (4) is a three-point hinged structure, the middle point is a fixed point, and the two ends are movable points; a pin shaft is provided in the fixed point.

6. The high-reliability dead-center automatic locking device according to claim 1, Characterized in that: The locking device (2), the swing link (3), the crankshaft (4), the reversing shaft (6), the sliding rod (7), and the hinge shaft (9) are hinged through pin shafts to form a linkage structure.

Images